The distances and times of practice runs for four students on a cross - country team are shown in the table below. Runner Distance (miles ) 3 Time (minutes 21 Sean 32 Gwen 30 5 Marc Imani 14 2 Select all the statements that are correct . Sean's average time per mile was 7 minutes . Gwen's average time per mile was 8 minutes . Marc's average time per mile was 7 minutes . average time per mile was 6 minutes , Marc had the fastest average time per mile . Sean had the slowest average time per .